폴리올 공정을 이용한 에틸렌 글리콜이 나노 크기의 산화아연 나노입자에 미치는 영향
Effect of ethylene glycol on the nano-sized ZnO nanoparticles using polyol process
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초록
산화아연 나노입자는 수산기 (-OH)가 포함된 에틸렌 글리콜을 이용하여 폴리올 방법으로 제조하였다. 폴리올 방법으로 생성된 아연 화합물은 하이드록시탄산아연 (Zinc carbonate hydroxide, Zn₅(OH)₆(CO₃)₂)과 산화아연 (ZnO) 결정구조가혼재함을 확인하였다. 400°C, 600°C 및 800°C에서 하소하여, 하소 온도 조건에 따른 산화아연 입자 크기, 형상 및 결정성 영향을 확인하였다. 증류수를 이용한 황산 아연 전구체 용액과 에틸렌 글리콜이 첨가된 혼합 용액으로 제조된 황산 아연전구체 용액을 각각 800°C에서 하소하여 제조된 산화아연 분말을 입도 분석하였다. 전자의 경우 약 404 ± 51 nm의 입자 크기를 갖는 반면, 후자의 경우 약 109 ± 29 nm로 보다 균일한 나노 입자 형태의 산화아연 제조가 가능하였다. 에틸렌 글리콜을 통해 물 분자 영향을 제어하여 직접적인 산화아연 제조 및 나노 입자 크기 형태로 제조가 가능함을 제시하였다.
Abstract
Zinc oxide nanoparticles were synthesized using the polyol method with ethylene glycol containing hydroxyl groups (-OH). It was confirmed that the zinc compounds prepared by the polyol method were a mixture of zinc carbonatehydroxide (Zn₅(OH)₆(CO₃)₂) and zinc oxide (ZnO) crystalline structures. Calcination at 400°C, 600°C and 800°C was performed to examine the effects of calcination temperature on the particle size, morphology and crystallinity of zinc oxide. ZnO powders of calcination at 800°C was evaluated to particle size analysis from ethylene glycol containing precursor solution compared with distilled water based solution. The zinc oxide particles obtained from the former had a particle size of approximately 404 ± 51 nm, whereas those from the latter exhibited a more uniform nanoparticles morphology with aparticle size of approximately 109 ± 29 nm. This demonstrates that the addition of ethylene glycol can control the influence of water molecules, enabling the direct synthesis of zinc oxide in the form of uniform nanoparticles.
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